GPT-4 vs OpenAI o4-mini

Compare GPT-4 and OpenAI o4-mini, both from OpenAI, tested across 20 shared challenges. Updated April 2026.

Which is better, GPT-4 or OpenAI o4-mini?

GPT-4 and OpenAI o4-mini are both competitive models. GPT-4 costs $30/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.

Key Differences Between GPT-4 and OpenAI o4-mini

GPT-4 is made by openai while OpenAI o4-mini is from openai. On pricing, GPT-4 costs $30/M input tokens vs $1.1/M for OpenAI o4-mini.

Our Verdict
GPT-4
GPT-4
OpenAI o4-mini
OpenAI o4-mini

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

OpenAI o4-mini is 14x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
100%

GPT-4 uses 82.3x more bold

GPT-4
OpenAI o4-mini
59%Vocabulary73%
18wSentence Length15w
1.10Hedging0.18
0.8Bold0.0
2.5Lists2.1
0.00Emoji0.00
0.00Headings0.00
0.45Transitions0.02
Based on 15 + 10 text responses
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Ask them anything yourself

GPT-4OpenAI o4-mini

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
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